How to get rid of fleas in my house on time?

I have planned this sleepover/party thing for 5 people tomorrow and i and all of a sudden i get fleas EVERYWHERE downstairs and they are now (little by little) advancing upstairs. i have a cat that doesnt go inside the house, just the garage. i guess we carried them in. (but dont tell me how to treat my cat cause it is already treated) i have 25 hours to get rid of them. is there anything that can help in time? thanks (please dont tell me to reschedule unless its ABSOLUTLY nessecary cause if i do it would be the 3rd time and my frinds would get annoyed and not come at all)